TITLE: GCN CIRCULAR NUMBER: 25467 SUBJECT: Fermi trigger No 588350802 Global MASTER-Net observations report DATE: 19/08/24 20:31:22 GMT FROM: Vladimir Lipunov at Moscow State U/Krylov Obs V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tyurina, P.Balanutsa, A.Kuznetsov, F.Balakin, V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva, D.Kuvshinov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C.Lopez, F. Podesta, C.Francile (Observatorio Astronomico Felix Aguilar OAFA), H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE), R. Rebolo, M. Serra (The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), V. Yurkov, A. Gabovich, Yu. Sergienko (Blagoveschensk Educational State University) MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in South Africa (South African Astronomical Observatory) started inspect of the Fermi GRB190824.62 (trigger No 588350802, 13h 52m 21.60s , -39d 43m 48.00s, R=1.5) errorbox 19364 sec after trigger time at 2019-08-24 20:09:21 UT, with upper limit up to 18.6 mag. The observations began at zenit distance = 68 deg. The sun altitude is -49.3 deg. The galactic latitude b = -60 deg., longitude l = 98 deg. Real time updated cover map and OT discovered available here: https://master.sai.msu.ru/site/master2/observ.php?id=1114676 We obtain a following upper limits. Tmid-T0 | Date Time | Site | Coord (J2000) |Filt.| Expt. | Limit| Comment _________|_____________________|_____________________|____________________________________|_____|_______|_______|________ 19394 | 2019-08-24 20:09:21 | MASTER-SAAO | ( 13h 50m 02.27s , -39d 55m 16.01s) | C | 60 | 18.6 | 19504 | 2019-08-24 20:11:11 | MASTER-SAAO | ( 13h 47m 13.25s , -37d 54m 57.76s) | C | 60 | 18.5 | 19611 | 2019-08-24 20:12:57 | MASTER-SAAO | ( 13h 54m 04.83s , -41d 55m 14.79s) | C | 60 | 18.5 | 19808 | 2019-08-24 20:16:14 | MASTER-SAAO | ( 14h 0m 29.00s , -39d 54m 55.30s) | C | 60 | 18.6 | Filter C is a clear (unfiltred) band. The observation and reduction will continue. The message may be cited.